<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <meta name="geometry" content="interval">
  <link rel="stylesheet" href="./assets/common.css">
  <title>multi-view-tooltip</title>
</head>

<body>
  <div id="canvas"></div>
  <script src="./assets/data-set.min.js"></script>
  <script src="../build/g2.js"></script>
  <script>
    const data = [
        { country: 'Asia', year: '1750', value: 502 },
        { country: 'Asia', year: '1800', value: 635 },
        { country: 'Asia', year: '1850', value: 809 },
        { country: 'Asia', year: '1900', value: 947 },
        { country: 'Asia', year: '1950', value: 1402 },
        { country: 'Asia', year: '1999', value: 3634 },
        { country: 'Asia', year: '2050', value: 5268 },
        { country: 'Africa', year: '1750', value: 106 },
        { country: 'Africa', year: '1800', value: 107 },
        { country: 'Africa', year: '1850', value: 111 },
        { country: 'Africa', year: '1900', value: 133 },
        { country: 'Africa', year: '1950', value: 221 },
        { country: 'Africa', year: '1999', value: 767 },
        { country: 'Africa', year: '2050', value: 1766 },
        { country: 'Europe', year: '1750', value: 163 },
        { country: 'Europe', year: '1800', value: 203 },
        { country: 'Europe', year: '1850', value: 276 },
        { country: 'Europe', year: '1900', value: 408 },
        { country: 'Europe', year: '1950', value: 547 },
        { country: 'Europe', year: '1999', value: 729 },
        { country: 'Europe', year: '2050', value: 628 },
        { country: 'Oceania', year: '1750', value: 200 },
        { country: 'Oceania', year: '1800', value: 200 },
        { country: 'Oceania', year: '1850', value: 200 },
        { country: 'Oceania', year: '1900', value: 300 },
        { country: 'Oceania', year: '1950', value: 230 },
        { country: 'Oceania', year: '1999', value: 300 },
        { country: 'Oceania', year: '2050', value: 460 }
    ];
    const ds = new DataSet();
    const dv = ds.createView('demo')
      .source(data)
      .transform({
        type: 'percent',
        field: 'value',       // 统计销量
        dimension: 'country',   // 每年的占比
        groupBy: [ 'year' ], // 以不同产品类别为分组
        as: 'percent'
      });

    const chart = new G2.Chart({
      container: 'canvas',
      forceFit: true,
      height: window.innerHeight
    });
    chart.source(dv, {
      percent: {
        min: 0,
        formatter(val) {
          return (val * 100).toFixed(2) + '%';
        }
      }
    });
    chart.intervalStack()
      .position('year*percent')
      .label('percent', () => {
        return {
          position: 'middle',
          offset: 0,
          textStyle: { fill: 'red' }
        };
      })
      .color('country', [ '#FF6A84', '#30A4EB', '#45BFC0', '#FFCC55' ])
      .shape('top-line');
    chart.render();

  </script>
</body>

</html>
